Selection and Application of Tapchangers to Transformers

Sridhar, T. V.

doi:10.1007/978-981-15-3955-8_5

Cited by 2 publications

(2 citation statements)

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“…Flexible AC transmission systems (FACTS) [11], capacitors [12], distribution generators (DG) [13], and on-load tap changing (OLTC) transformers [14] are examples of devices that can be used to stabilize and maintain the voltage of a system at the desired level after a heavy load or source drop. Of these devices, OLTC transformers are most commonly used [15]. An OLTC is a critical component that is suitable for systems where the power flows in just one direction [16].…”

Section: Introductionmentioning

confidence: 99%

Normal operation and reverse action of on-load tap changing transformer with its effect on voltage stability

Alkahdely

Alsammak²

2023

Bulletin EEI

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As electrical grids have expanded significantly, so too has the load on network buses. This, however, causes voltage drops to occur at the load side of the grid. A voltage drop causes a system to become unstable, increases its power loss, and reduces the amount of power that it transfers before finally leading to a collapse. An on-load tap changing (OLTC) transformer can be used to prevent the negative effects of an increased load by restoring the load voltage to its base value when sudden disturbances occur in the source. However, incorrect OLTC placement can cause the system to become unstable and cause collapse. This is referred to as the reverse action phenomenon of an OLTC. Therefore, this present study examined improving the ability of an OLTC to increase system stability and prevent collapse. A simple radial power distribution system was modelled in MATLAB. The results indicate that the proposed model can increase system stability and prevent collapse.

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Section: Introductionmentioning

confidence: 99%

Normal operation and reverse action of on-load tap changing transformer with its effect on voltage stability

Alkahdely

Alsammak²

2023

Bulletin EEI

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“…The OLTC performances in the power systems depend on their factory specifications and the controller unit settings. Because the OLTC performance in the power systems is related with its response speed and with the regulation bandwidth, which is related with the OLTC factory specifications and the controller unit settings [20].…”

Section: Introductionmentioning

confidence: 99%

A Review on Power System Voltage Stability with Limitation of an On Load Tap Changing Transformer

Alkahdely¹,

Alsammak²

2023

(AREJ)

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Voltage stability of power systems reflects challenges to the power system operators due to its effect on the power systems components performances. Therefore, many solutions were invented in order to keep the systems within the voltage stability accepted limits. Because of the huge expansion of the power grids and the different loads natures on the grids, many techniques and solutions are used. The On Load Tap Changing Transformer (OLTC) was one of those techniques. In this paper, a review of past works that deal with the voltage stability limits, voltage stability improvement ways, OLTC types, the OLTC reverse action, and OLTC effect on voltage stability, in addition to several ways that make the OLTC work better. are discussed. The paper also sheds the light on the possible ways that may be employed to prevent the OLTC reverse action.

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Selection and Application of Tapchangers to Transformers

Cited by 2 publications

References 0 publications

Normal operation and reverse action of on-load tap changing transformer with its effect on voltage stability

Normal operation and reverse action of on-load tap changing transformer with its effect on voltage stability

A Review on Power System Voltage Stability with Limitation of an On Load Tap Changing Transformer

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